Reversible fan



R. M. MURRAY.

lREVERSSIBLE FAN. APPLICATION FILED MAR. I5, 1919.

, Patented July 12, 1921.y

*ullSuTED"STATESl PATENT oFFicE.

RAYM. MURRAY, 0E EILLINGS, MONTANA REVERSIBLE EAN.

1,384,672. j I 511612110811011 0f Rm la'flmhl Patented July 1?,"1-921.v

v App-lisation led arch'l, 1919. Serial No. `282,830.A n To all 'whom t may concern. rically through the shaft. This pin also Be it known that I, RAY M. MURRAY; a extends through a-sleeve 7 encircling the tu- `citizen of the United States, and a resident bular shaft 3 and movable bodily thereon in of Billings, county of Yellowstone, and State the direction of the length of the shaft. The 60 adjusted angnlarly in relation to such shaft, as required. at the will of the operator.

screw bolt dctachabl mounted upon the portion 16 of the tubu ar shaft 3 normally retains the casing 1l' in position.

The operation of my device is as follows:

lower being applied to the pulley 12 by means of a belt, or the like, the case 11 and thc parts carried by it are rotated in a manner well understood in this art. As this takes place the blades 23 may be any de-.

' and if the sleeve 7 be shifted so that the grooved Wheel 19 moves to the left .according. to Fig. 1, the blades are 'given a pitch in the opposite direction. Thusthe operator, by notlng the position of the sleeve 7 and moving this sleeve to the right or left, according to Fig. 1, may vary Within reasonable limits, the pitch of the blades 23. Each time the sleeve 7 is moved into its middle position, as indicated in Fig. 1, the blades are brought to their -neutral position indicated in Fig. 1. But if the sleeve 7 be shifted in either directionfrom this middle position, the blades are each tilted or iven a different pitchl accordingly, all of t e blades being actuated in the same manner at the same time.

I do not limit myself to the precise mechanism shown, as variations may be made therefrom Without departing from the spirit of my invention, the scope of my invention being commensurate with my claims. Neither do I vlimit myself to any particular material to be employed in maklng my device, nor to any special use for which the device may be emljloyed.

aving thus described my invention what I claim as new, and desire to secure by Letters-Patent is as follows:

1. A device of the character described, comprising a bracket, a stationary tubular shaft carried thereby and provided with pairs of opposed slots near opposite ends thereof, a pin extending through one pair of said slots, a stationary shaft located Within said tubular shaft and movable bodily in the direction of the length thereof, another pin carried by said last mentioned Shaft and extending through the other pairv of slots,

a grooved Wheel mounted on the first namedl shaft over the last named slots and receiving the second named pin therethrough, a revoluble casing on said. tubular shaft and inclosing a portion of the same and said grooved Wheel and second named pin, a blade carried by said revoluble casing, and adjustable angularly in relation'theretmand mechanism connected with said blade and with said grooved wheel for enabling axial adjustment of said wheels to adjust the pitch of the blade.

2. A device of the character described, comprising a bracket, a stationary tubular shaft carried thereby and provided With pairs of op sed slots near opposite ends thereof, a pin extending through one pair of said slots, a stationary shaft located Within said tubular shaft and movable bodily" yshaft and inclosing a portion of the same and said grooved Wheel and second named pin, a plurality of radial blades carried by said revoluble casing, said casing being pro-v vided. with bearing sleeves receiving the blades for angular adjustment therein with reference to the casing and the axis of the shafts, a removable head on the end of the casing, said casing being adapted to receive suitablelubrication, means to prevent displacement of the casing with respect to the tubular shaft, crank members connected with said blades for changing the pitch thereof, and rollers carried by said crank members and engaging said grooved Wheel for the purpose of enabling said wheel to change the relative positions 'of saidcrank members by shifting the pin and second named lshaft longitudinally within thel tubular shaft.

- RAY M. MURRAY. 

